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Finding the Fourth Proportional to 640,486.26, 883,916.82 and 354,000.15

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Solution

The fourth proportional to 640,486.26, 883,916.82 and 354,000.15 is: 488,545.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,486.26 : 883,916.82 = 354,000.15 : x
  2. Step 2: Convert to fraction form
    640,486.26/883,916.82 = 354,000.15/x
  3. Step 3: Cross multiply
    640,486.26x = 883,916.82 × 354,000.15
  4. Step 4: Simplify right side
    640,486.26x = 312,906,686,867.52
  5. Step 5: Solve for x
    x = 312,906,686,867.52/640,486.26
  6. Step 6: Final answer
    x = 488,545.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.